Lion Chasing His Tail?

Hey guys, I'm not really sure what this is, but it's pretty cool. It looks like a lion chasing his own tail or something. Anyways, I just thought I would share it with the group.

At first glance i thought maybe someone tried to make jewelry from it, but upon closer inspection it looks like a 'test cut' It's in pretty good shape and I think it's Greek. If I had to guess maybe 400BC?